NEW BIO
Terms
undefined, object
copy deck
- blastula
- The hollow ball of cells marking the end stage of cleavage during early embryonic development.
- pom
- fruit
- coelem
- A body cavity completely lined with mesoderm.
- endoderm
- The innermost of the three primary germ layers in animal embryos; lines the archenteron and gives rise to the liver, pancreas, lungs, and the lining of the digestive tract.
- phyc
- seaweed; algae
- anterior
- Referring to the head end of a bilaterally symmetrical animal.
- pleur
- rib; lung
- poly
- many; several
- phyll
- leaf
- deuterosomes
- One of two distinct evolutionary lines of coelomates, consisting of the echinoderms and chordates and characterized by radial, indeterminate cleavage, enterocoelous formation of the coelom, and development of the anus from the blastopore.
- photo
- light
- larva
- A free-living, sexually immature form in some animal life cycles that may differ from the adult in morphology, nutrition, and habitat.
- radial cleavage
- A type of embryonic development in deuterostomes in that the planes of cell division that transform the zygote into a ball of cells are either parallel or perpendicular to the polar axis, thereby aligning tiers of cells one above the other.
- germ layers
- Three main layers that form the various tissues and organs of an animal body.
- dorsal
- Pertaining to the back of a bilaterally symmetrical animal.
- ventral
- Pertaining to the underside, or bottom, of a bilaterally symmetrical animal.
- mesoderm
- The middle primary germ layer of an early embryo that develops into the notochord, the lining of the coelom, muscles, skeleton, gonads, kidneys, and most of the circulatory system.
- pod
- foot
- spiral cleavage
- A type of embryonic development in protostomes, in which the planes of cell division that transform the zygote into a ball of cells occur obliquely to the polar axis, resulting in cells of each tier sitting in the grooves between cells of adjacent tiers.
- posterior
- Pertaining to the rear, or tail, of a bilaterally symmetrical animal.
- gastrovascular cavity
- An extensive pouch that serves as the site of extracellular digestion and a passageway to disperse materials throughout most of an animal's body.
- metamorphosis
- The resurgence of development in an animal larva that transforms it into a sexually mature adult.
- port
- carry
- cleavage
- The process of cytokinesis in animal cells, characterized by pinching of the plasma membrane; specifically, the succession of rapid cell divisions without growth during early embryonic development that converts the zygote into a ball of cells.
- plan
- roaming; wandering
- acoelmates
- A solid-bodied animal lacking a cavity between the gut and outer body wall.
- protostomes
- A member of one of two distinct evolutionary lines of coelomates, consisting of the annelids, mollusks, and arthropods, and characterized by spiral, determinate cleavage, schizocoelous formation of the coelom, and development of the mouth from the blastopore.
- eumetazoa
- Members of the subkingdom that includes all animals except sponges.
- ectoderm
- The outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and, in some phyla, the nervous system, inner ear, and lens of the eye.
- phore
- bearer
- pre
- before; ahead of time
- pro
- forward; favoring
- por
- opening
- post
- after; behind
- cephalization
- An evolutionary trend toward the concentration of sensory equipment on the anterior end of the body.
- plasm; plast
- form; formed into
- phon; phone
- sound
- radial symmetry
- Characterizing a body shaped like a pie or barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
- phte; phyt
- plant
- physi
- nature; natural qualities
- bilateral symmetry
- Characterizing a body form with a central longitudinal plane that divides the body into two equal but opposite halves.
- pneumo
- lungs; air
- parazoa
- Members of the subkingdom of animals consisting of the sponges.